documentation update

Author: ddmitov

REQUIREMENTS.md

@@ -7,7 +7,7 @@ The only Linux and Macintosh compile-time requirement of PEB is a GCC-based Qt d
 The source code of PEB is not MSVC-compatible and PEB can not be compiled using any MSVC-based Windows version of Qt.   This means that:  
 * PEB Windows binaries can be compiled only by a GCC-based Qt development bundle.
 * Only ```QtWebKit``` can be used by a Windows binary of PEB.  
-  Windows GCC-based Qt development bundles version 5.6 or later have neither ```QtWebEngine```, nor ```QtWebKit```.  
+  Windows GCC-based Qt development bundles version 5.6.x or higher have neither ```QtWebEngine```, nor ```QtWebKit```.  
 * Updated ``QtWebKit`` headers and libraries have to be manually added from the  
   [QtWebKit repository of Konstantin Tokarev (annulen)](https://github.com/annulen/webkit/releases) to all Windows GCC-based Qt development bundles version 5.6 or later.
 
@@ -29,7 +29,7 @@ make
 ## Compile-Time Settings
 All compile-time settings require editing the ``src/peb.pro`` project file according to the following instructions.  
 
-* QtWebKit Use  
+* Updated QtWebKit  
   To use ```QtWebKit``` or ```QtWebEngine``` depending on the Qt version, which is the default setting:  
 
   ```QMake

src/peb.pro

@@ -24,25 +24,26 @@ greaterThan (QT_MAJOR_VERSION, 4) {
     message ("Qt Libraries: $$[QT_INSTALL_LIBS]")
 
     ##########################################################
-    # QTWEBKIT USE
+    # ANNULEN QTWEBKIT
     # Updated QtWebKit headers and libraries for
-    # Qt versions 5.6 or higher can be downloaded from:
+    # Qt versions 5.6.x or higher can be downloaded from:
     # https://github.com/annulen/webkit/releases
 
-    # To use QtWebKit or QtWebEngine depending on the Qt version:
+    # To use QtWebKit or QtWebEngine depending on the Qt version,
+    # which is the default setting:
     # ANNULEN_QTWEBKIT = 0
     # QtWebKit is the default web engine for Qt versions up to 5.5.x and
     # QtWebEngine is the default web engine for Qt versions 5.6.x or higher
 
-    # To use the updated QtWebKit version of Konstantin Tokarev (annulen) with
-    # a Qt version higher than 5.5:
+    # To use an updated QtWebKit version from
+    # the repository of Konstantin Tokarev (annulen) with
+    # a Qt version 5.6.x or higher:
     # ANNULEN_QTWEBKIT = 1
 
-    # ANNULEN_QTWEBKIT = 1
-    # has no effect on Qt versions 5.5 or lower.
+    # This setting has no effect on Qt versions 5.5 or lower.
     ##########################################################
 
-    ANNULEN_QTWEBKIT = 1
+    ANNULEN_QTWEBKIT = 0
 
     DEFINES += "ANNULEN_QTWEBKIT=$$ANNULEN_QTWEBKIT"